ok, here's the deal. I left the room and came back and my compy was off. So I turned it back on and poof it's back off again. The lights on the mobo are still on but now, I try turning it on and as soon as the fans start turning it shuts off again. Innitially it started back into windows but now I can't get it to stay on longer than 2 sec. And all this just started happening today. I haven't installed any new hardware nor programs either. This is what I have: DFI Lan Party UT nF3 250Gb - mobo Athlon 64 3400 1 gb ddr Corsair PNY Nvidia 6800 GT 120gb hd Maxtor - no longer have the 80gb 500w power supply Nothing is overclocked at all. I'm running windows xp with all the updates... Periodically I'd get a nv4disp.dll error while playing WoW but that's just a driver issue from what I can tell (whole nother problem - updated drivers and tried the older ones as well - no fix). Temperatures are fine too. I even opened up the case and put a small room fan in and temps are at roughly 79 degrees F. Any ideas? Also sorry if this is posted in the wrong place...didn't know if it was a hardware issue or one between the chair and the compy... UPDATE: I switched the videocards around trying to pinpoint the issue, no go...off to see if it's the HD taking a crap on me.